One of the most lively panels to take place at this week's conference explored one of the most elemental foods in the human diet: milk. You can watch author Anne Mendelson, New York State dairy farmer Audrey Donahoe, the National Dairy Council's Jim Mulhern, and moderator Urvashi Rangan discuss the history and industrialization of the beverage in the above video. The participants also took a number of questions from the audience; watch these exchanges below: